Question

我在目标c中编写代码以查看最近的当前蓝牙设备的可用列表。但是没有显示任何设备。我在下面显示我的代码，看看并告诉我哪里错了。我使用iPhone se进行测试，安装iOS 11.1和蓝牙版本4.2。我的输出是：

CoreBluetooth BLE硬件已关闭

refreshPreferences：HangTracerEnabled：0

refreshPreferences：HangTracerDuration：500

refreshPreferences：ActivationLoggingEnabled：0

ActivationLoggingTaskedOffByDA：0

CoreBluetooth BLE硬件已开启并准备就绪

但是在屏幕上显示它们不是任何设备显示我的代码如下是调用扫描外围设备：

- (void)centralManagerDidUpdateState:(CBCentralManager *)central

{
switch (central.state) 

{

 case CBCentralManagerStatePoweredOff:

            NSLog(@"CoreBluetooth BLE hardware is powered off");

            break;

        case CBCentralManagerStatePoweredOn:

            NSLog(@"CoreBluetooth BLE hardware is powered on and ready");

           [self.centralManager scanForPeripheralsWithServices:nil options:nil];

            break;

        case CBCentralManagerStateResetting:

            NSLog(@"CoreBluetooth BLE hardware is resetting");
            break;
        case CBCentralManagerStateUnauthorized:
            NSLog(@"CoreBluetooth BLE state is unauthorized");
            break;
        case CBCentralManagerStateUnknown:
            NSLog(@"CoreBluetooth BLE state is unknown");
            break;
        case CBCentralManagerStateUnsupported:
            NSLog(@"CoreBluetooth BLE hardware is unsupported on this platform");
            break;
        default:
            break;
    }
}

所以我在哪里错了或iPhone中的任何设置都可以？

如何在目标c中看到蓝牙可用设备？

0 个答案: